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MARKETABLE SECURITIES: (Schedule of Company's Marketable Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Dec. 31, 2020
Level 2 securities:      
Marketable securities $ 9,846 $ 1,709 $ 21,652
U.S government and agency bonds [Member]      
Level 2 securities:      
Marketable securities 1,174 275  
Other foreign government bonds [Member]      
Level 2 securities:      
Marketable securities 1,507 0  
Corporate bonds [Member]      
Level 2 securities:      
Marketable securities [1] $ 7,165 $ 1,434  
[1] Investments in Corporate bonds rated A or higher.